SUMMARY

After upgrading to Qt 5.12 Beta, when using the Wayland session, and when PlasmaShell panel widget popups are activated, they are drawn at the top-left of the screen.

Interestingly, in the case of the Application Menu and System Tray widgets, clicking on another subitem or hovering over another menu item, the popups correct their positions. This is reset after clicking on another panel widget.

STEPS TO REPRODUCE
1. Upgrade to Qt 5.12 Beta
2. Start Plasma Wayland session
3. Click around on PlasmaShell panel widgets

OBSERVED RESULT

Popups will be displayed at top-left of screen

EXPECTED RESULT

Popups should popup at their normal positions

SOFTWARE VERSIONS
(available in About System)
KDE Plasma Version: 5.14
KDE Frameworks Version: 5.50
Qt Version: 5.12 Beta

ADDITIONAL INFORMATION

Screenshots will be attached displaying the issue